Disk Drive Unit

1. A disk drive device comprising a signal detection section that detects a disk signal and a disk ejection mechanism that ejects a disk, characterized in that said disk drive device comprises: mechanism control means that controls the drive of said disk ejection mechanism and authentication control means that outputs a disk ejection instruction to said mechanism control means when a disk ejection instruction and authentication information are input, said authentication control means being connected with authentication information input means that inputs authentication information, and said authentication control means comprises: an authentication information storage section that stores prescribed authentication information; a decision section that determines whether or not the authentication information that is input from said authentication information input means agrees with the authentication information that is stored in said authentication information storage section; and a disk ejection instruction section that outputs a disk ejection instruction to said mechanism control means if a disk ejection instruction is input and said decision section determines that the authentication information is in agreement, said authentication information includes disk-specific information that is detected by said signal detection section on the disk and stored in said authentication information storage section, said disk-specific information is selected from one or more of the disk title, file name, holder name, table of contents information and playing time; and a display screen for displaying disk-specific information when a disk is inserted into the disk drive device and a user is enabled to select from the disk-specific information the authentication information to be stored by the authentication information input means.

2. The disk drive device according to claim 1 , characterized in that said disk ejection mechanism comprises a loading roller that is arranged so as to be capable of feeding a disk by rotation and a motor constituting a drive power source of said loading roller.

3. The disk drive device according to claim 2 , characterized in that said authentication information input means comprises a plurality of switches operated by a plurality of buttons; and said authentication information includes information relating to a combination of sequence and number of times of switch changeover in accordance with the operation of said plurality of buttons.

4. The disk drive device according to claim 2 , characterized in that said authentication information input means includes a voice identification section, and said authentication information includes speaker-limiting voice information.

5. The disk drive device according to claim 2 , characterized in that authentication information input means includes a fingerprint identification section, and said authentication information includes fingerprint information.

6. The disk drive device according to claim 2 , characterized in that said authentication information input means includes a retinal pattern detection section, and said authentication information includes retinal pattern information.

7. The disk drive device according to claim 2 , characterized in that the authentication information used in the determination by said decision section is at least two of a plurality of types of authentication information or is one or other of at least two types of the plurality of authentication information.

8. The disk drive device according to claim 1 , characterized in that said authentication information includes a password.

9. The disk drive device according to claim 8 , characterized in that the authentication information used in the determination by said decision section is at least two of a plurality of types of authentication information or is one or other of at least two types of the plurality of authentication information.

10. The disk drive device according to claim 1 , characterized in that said authentication information input means includes a plurality of switches operated by a plurality of buttons; and said authentication information includes information relating to a combination of sequence and number of times of switch changeover in accordance with the operation of said plurality of buttons.

11. The disk drive device according to claim 10 , characterized in that the authentication information used in the determination by said decision section is at least two of a plurality of types of authentication information or is one or other of at least two types of the plurality of authentication information.

12. The disk drive device according to claim 1 , characterized in that said authentication information input means includes a voice identification section, and said authentication information includes speaker-limiting voice information.

13. The disk drive device according to claim 12 , characterized in that the authentication information used in the determination by said decision section is at least two of a plurality of types of authentication information or is one or other of at least two types of the plurality of authentication information.

14. The disk drive device according to claim 1 , characterized in that authentication information input means includes a fingerprint identification section, and said authentication information includes fingerprint information.

15. The disk drive device according to claim 14 , characterized in that the authentication information used in the determination by said decision section is at least two of a plurality of types of authentication information or is one or other of at least two types of the plurality of authentication information.

16. The disk drive device according to claim 1 , characterized in that said authentication information input means includes a retinal pattern detection section, and said authentication information includes retinal pattern information.

17. The disk drive device according to claim 16 , characterized in that the authentication information used in the determination by said decision section is at least two of a plurality of types of authentication information or is one or other of at least two types of the plurality of authentication information.

18. The disk drive device according to claim 1 , characterized in that the authentication information used in the determination by said decision section is at least two of a plurality of types of authentication information or is one or other of at least two types of the plurality of authentication information.

19. The disk drive device according to claim 18 , characterized in that said authentication information includes a password.

20. The disk drive device of claim 1 , wherein said authentication information is directly related to the data content stored on the disk that is also to be reproduced from the disk when read by the signal deletion section.

21. A disk drive device comprising a signal detection section that detects a disk signal and a disk ejection mechanism that ejects a disk, characterized in that said disk drive device comprises: a loading roller in the disk ejection mechanism for contacting the disk to insert and remove the disk to and from the disk drive device; a display screen displaying disk-specific information when the disk is inserted into the disk drive device; an operator input section that enables an authentication control section to designate and enter authentication information selected by the operator from the disk-specific information unique to the disk displayed on the display screen; a registration management section that manages the authentication information and stores the selected portion of the disk-specific information designated by the operator from the display screen as the authentication information in a memory when a password entry mode of operation is enabled; mechanism control section that controls the drive of said disk ejection mechanism; an authentication control section that outputs a disk ejection instruction to said mechanism control means when a disk ejection instruction and authentication information are input, said authentication control section being connected with the operator input section that inputs authentication information, and comprises: a decision section that determines whether or not the authentication information that is input from said operator input section agrees with the authentication information that was stored in said memory during the password entry mode of operation; and a disk ejection instruction section that outputs a disk ejection instruction to said mechanism control section if a disk ejection instruction is input and said decision section determines that the inputted authentication information is in agreement with the stored authentication information in the memory.

22. A disk drive device comprising a signal detection section that detects a disk signal and a disk ejection mechanism that ejects a disk, characterized in that said disk drive device comprises: a disk ejection mechanism for contacting the disk to insert and remove the disk to and from the disk drive device; a display screen displaying disk-specific information when the disk is inserted into the disk drive device; an operator input section that enables an authentication control section to designate and enter authentication information selected by the operator from the disk-specific information unique to the disk displayed on the display screen; a registration management section that manages the authentication information and stores the selected portion of the disk-specific information designated by the operator from the display screen as the authentication information in a memory when a password entry mode of operation is enabled; mechanism control section that controls the drive of said disk ejection mechanism; an authentication control section that outputs a disk ejection instruction to said mechanism control means when a disk ejection instruction and authentication information are input, said authentication control section being connected with the operator input section that inputs authentication information, and comprises: a decision section that determines whether or not the authentication information that is input from said operator input section agrees with the authentication information that was stored in said memory during the password entry mode of operation; and a disk ejection instruction section that outputs a disk ejection instruction to said mechanism control section if a disk ejection instruction is input and said decision section determines that the inputted authentication information is in agreement with the stored authentication information in the memory.